Nouns:
* Fan
* Face
* Fact
* Fish
* Foot
* Fowl
* Frog
Verbs:
* Fix
* Find
* Feel
* Fight
* Fall
* Fly
* Feed
Adjectives:
* Fat
* Few
* Fine
* Free
* Full
* Fast
Other:
* For
* From
* Fox
* Fun
This is not an exhaustive list, but it provides a good starting point.